Add fading animation for Episode Fanart
When browsing episode pages and a full-size episode fanart exists, it first loads the show fanart then abruptly replaces with episode fanart.
If the episode artwork is available on the server already it should load that instead of the show artwork.
If it doesn't already exist (and is downloading) then create some sort of fading animation which does a nice transition when available. I don't think you currently look for episode artwork online if not available locally, just throwing this idea around in case you do.
If it is by design to show the tvshow fanart first then as in point number 2 do a fading animation to episode artwork.
This is a firefox issue not supporting a CSS fade for background images. The effect will be fixed in the next code push. The episode image is checked client side to see if its high enough res to use.
fyi, I use FireFox browser. If you already have some sort of animation then its mostly likely a bug in your cross browser support.